947688487 has 2 divisors, whose sum is σ = 947688488. Its totient is φ = 947688486.

The previous prime is 947688451. The next prime is 947688493. The reversal of 947688487 is 784886749.

947688487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 947688487 - 2¹⁵ = 947655719 is a prime.

It is a super-2 number, since 2×947688487² = 1796226936784698338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947688587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473844243 + 473844244.

It is an arithmetic number, because the mean of its divisors is an integer number (473844244).

Almost surely, 2^947688487 is an apocalyptic number.

947688487 is a deficient number, since it is larger than the sum of its proper divisors (1).

947688487 is an equidigital number, since it uses as much as digits as its factorization.

947688487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21676032, while the sum is 61.

The square root of 947688487 is about 30784.5494850907. The cubic root of 947688487 is about 982.2496171491.

The spelling of 947688487 in words is "nine hundred forty-seven million, six hundred eighty-eight thousand, four hundred eighty-seven".